GST ITC

my client has two business one is of hotel services and other is of rental services in this month there is a itc of rs. 5,000 in hotel services but an output tax of rs. 15,000 of rental services so kindly tell me whether he can adjust ₹5,000 with rs.15,000 and pay the balqnce of rs. 10,000 or not, also tell me whether he has to take seperate registration or not because of deemed distinct business in same state