What is the meaning of CTC in Lacs?

CTC in lac(s) means Cost To Company in Lacs(Lakhs).

Cost To Company is the total cost to employ a given person (e.g. you)

Lac is a unit of 100,000 (one hundred thousand). E.g. if your annual salary is $120,000 and the company has to pay 25% tax after your salary, the CTC in Lacs is $120,000 * 1.25 / 100,000 = 1.5 .