considering loop A in clockwise direction
3 - 4 = - 3 i2 + 2 i1
3 - 4 + 3 i2 - 2i1 = 0
option (a) is correct
======
2.
net potential
V = V + 2 V - V +3 V - V
i R = 4 V
i = 4V/R
option (d) is correct
======
Comment before rate in case any doubt, will reply for sure.. goodluck
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