The correct option is A 230.3 minutes
For a first order reaction,
rate constant, k=0.693t1/2=0.69369.3=0.01 min−1
k=2.303tlog10aa−x
where, a= initial amount of reactant
(a−x)=amount of reactant remaining after time t
′t′=0.1a for 90% completion
0.01=2.303tlog10a0.1a
t=2.3030.01=230.3 min
Hence, (a) option is correct.