123 : 4 :: 726 : ?

Pea-hen : Pea - cock :: Bitch : ? 

Direction: Select the related word from the given alternatives.

Ravi Shankar: Sitar :: Bismillah Khan:?

The number of letters skipped in between the adjacent letters in the series are consecutive even numbers. 

Select the correct option that will fill in the blank and complete the series.
LM, QR, VW___

If 3=6, 4=24, 5=120 then 6=?

USA : Congress :: Iran : ? 

After starting from his house. Naren walked a few meters towards the east. From there, he took a right turn and walked 80m. and then took a left turn and walked 20 m. Finally, he took a right turn again and walked 40 m to reach the hospital . If the air distance between his house and the hospital is 130 m. how far did Naren walk towards the east initially?