Given set
12, 20, 28 

An assertion (A) and a reason (R) are given below –
Assertion (A) :- Agricultural activities are less on mountainous region.
Reason (R) :- Mountains have less fertile terrain and difficult weather conditions.
Choose the correct option :-

Statement:

Beware of dogs, our dogs do not bark, but they are trained to distinguish between genuine guests and intruders.

Assumptions:

I. Barking dogs bite rarely.

II. Our dogs could be dangerous for intruders.

Three different positions of a dice are shown below. Which number appears on the face opposite the number 4?

In the word INSTRUCT, how many alphabets are there between which there are as many letters as there are between them in the English alphabet? 

Five friends A, B, C, D & E went to college, each one of them reached at different times. If B reached after C & D; A and E reached before C & D, then who was the last person to reach? 

Six trucks K, M, O, Q, S and U are parked around a circular path facing the center, Q is second to the left of U. S is to the immediate left of M. K is second to the right of O. O is to the immediate right of Q. Which truck is parked second to the left of O?

Five girls are sitting facing towards the north. Rekha is between Shalini and Neetu. Pooja is to the immediate right of Neetu and Shalini is to the immediate right of Neha. Who is sitting in the middle?