Assertion : The unit vectors `hati, hatj and hatk` have of distance and dimensions `[M^(o)L^(1)T^(o)]`.
Reason : The product of a scalar and a vector of a new scalar.

Answer

(A) p, q (B) p, q (C) p, q s (D) r, s

Explanation

(A) Initially, the potential difference exist between both shells, so positive charge is flow from high to low potential.
Wvery system wants to acquire minimum potential energy if possible for stability. So charge flown to achieve it.
(B) As explained in [A], charge flow does not depends on the size of sphere.
(C) Charge flow through wire until the potential becomes same for both shells.
(D) Potential is same everywhere inside a conducting shell. So no charge is flow through connecting wire, so no heat is produced.