What goes up but never comes down?

What is the next shape from answers A, B, C, and D figure?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

There are forty elephants and they have forty-fore heads. How can this be possible?

Identify the hidden meaning behind this picture?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?