Explanation

A deficiency of Vitamin D results in Rickets in children and osteomalacia in adults.

A deficiency of Vitamin D also causes:

• Bone Pain
• Weak Bones
•  Skeletal Deformities.

Sunlight is a good source of Vitamin D.

 Additional Information:

Vitamin A deficiency causes night blindness

Vitamin C deficiency causes scurvy 

Vitamin B (B7) deficiency causes hair fall

SH10-8-2023AGM 28.02.28ND16112023

Explanation

Most abundant element in Earth crust is Oxygen.

Oxygen in the crust is (46.1%).

The chemical formula of oxygen (dioxygen) is O2.

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List of 10 Most Abundant Elements in the Earth's Crust

Explanation

SH12-8-2023

Explanation

Jaffar Khan Mandokhail

Party name: PML-N

Governor Balochistan since: 04 May 2024

Predecessor: Abdul Wali Kakar 

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Explanation

Because sound is just vibrating air, space has no air to vibrate and therefore no sound in a vacuum.

Sound waves below 20 Hz are known as infrasound.

Sound waves above 20 kHz are known as ultrasound

Sound waves transmit a medium such as a gas, liquid, or solid.

• The speed of sound in air is about 343 meters per second
• The sound travels at 1,481 m/s in water 
• The speed of sound in a vacuum is zero meters per second.

Explanation

Mareena is afraid of spiders

نفیسہ مکڑیوں سے ڈرتی ہے۔

Generally, the word afraid takes the preposition of.

Afraid of means خوفزدہ 

ND12_8_2023

Explanation

Mohammed Abdul Kabir is a senior member of the Taliban leadership

and the acting Prime Minister of Afghanistan since 17 May 2023.

replaced: Mullah Mohammad Hassan AKhund

Explanation

Mercury is the only metal that is liquid at normal temperatures. 

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Chemical compounds of mercury have found uses in batteries, in biocides in the paper industry, in paints, and on seed grain, as antiseptics in pharmaceuticals, as reagents in laboratories, and as catalysts.

Four other elements are liquids slightly warmer than room temperature.

They are:

• francium
• cesium
• gallium
•  rubidium

ND31-12-2022

SH10-8-2023

Explanation

• Russia attacked Ukraine on 24 February 2022
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• On 24 February, before 5:00 a.m. Kyiv time, Putin announced a "special military operation" in eastern Ukraine and "effectively declared war on Ukraine."
• Russia retains control over 1.8% of the area around Kharkiv in the east of Ukraine
• ***
• reason for Russia and Ukraine War 2022:
• Throughout 2021, bilateral tensions rose due to a Russian military buildup surrounding Ukrainian territory
• ****
• The capital of Russia is: Moscow
• The area of Russia is 17.1 million km²
• The currency of Russia is: the Russian ruble
• The population of Russia is: 144.1 million (2020) World Bank
• The continent of Russia is: Europe, Asia

SH9-8-2023

Explanation

Symbol: Hg

Atomic number: 80

Melting point: -38.83 °C

Atomic mass: 200.59 u