Solve please


(Guest)

What is the effect on Gross profit, if closing
stock is undervalued by Rs.10,000 and opening
stock is overvalued by Rs.10,000?
a) G.P. will increase by Rs.10,000
b) G.P. will decrease by Rs.10,000
c) G.P. will decrease by Rs.20,000
d) No change in G.P.

explain how it is

according to me it is (d)