In the potentiometer circuit the balance point is at X. The balance point will be shifted right towards B when :

(A) Resistance R is increased keeping all other parameters constant
(B) Resistance S is increased keeping all other parameters constant
(C) Cell P is replaced by another cell whose emf is lower than Q
(D) The polarity of Q is reversed

Choose the correct answer from the options given below:

(A), (B) only

The correct answer is Option (3) → (A), (B) only