A public company can charge interest on calls in arrears at the rate not exceeding :

Correct option is A

A public company can charge interest on calls in arrears at a rate not exceeding  (a) 10% p.a.
The interest rate chargeable on calls in arrears is typically specified in a company's Articles of Association (AOA). 
· If the Articles of Association are silent: The default provisions of  Table F (a model set of Articles under the Companies Act, 2013) become applicable.
· According to Table F: A company can charge interest on the unpaid amount (calls in arrears) at a rate not exceeding 10% per annum, calculated from the due date until the date of actual payment.