According to the statement,
1 : 36 : : 2 : ?
Here, (1+5)² = 36
Similarly, (2+5)² =49
? ? =49

Menu' lists all the food items in a restaurant and in the same way, a catalogue is a list of all the books in a library.

'Bleat' is the sound produced by goat and in the same way 'Grunt' is the sound produced by a 'Camel'

Former is the grown up state of latter.

Both the words are opposite in meaning to each other.

Birds can fly while snakes crawl for movement.

As, Similarly,

Taka is the currency of Bangladesh. Similarly, Lira is the currency of Italy.

'Nurse' receives instructions from 'Doctor' and 'Follower' receives instructions from 'Leader'

'Food' is consumed in the 'Stomach' and 'Fuel' is consumed in 'Engine'