GK: For what reason is it advisable to remove pen ink before boarding a plane? Click here to know

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Question 1: For what reason is it advisable to remove pen ink before boarding a plane? 

Answer: Due to low air pressure at altitude 

Question 2: Where is the National Milk Research Station located?

Answer: Karnal (Haryana) 

Question 3: What causes blood to be red?

Answer: Because of hemoglobin

Question 4: How big is the size of the Sun than the Earth?

Answer: 109 times bigger 

Question 5: What is used to measure height?

Answer: Altimeter