Find out whether there is any grammatical error in below sentence.Another reason for pharmaceutical companies beefing up their / OTC (Over the Country) divisions is that prescription drugs with proven safety records which have been reached / the end of the their patent protection periodare

• A. nother reason for pharmaceutical companies beefing up their
• B. TC (Over the Country) divisions is that prescription drugs with proven safety records which have been reached
• C. he end of the their patent protection periodare
• D. llowed to be sold without a prescription. No error