Which options (abc) has grammar errors and if no errors (select d) section 1 a. we discussed about the problem so thoroughly b. on the eve of the examination c. that i found it very easy to work it out. d. no error section 2 a. an indian ship b. laden with merchandise c. got drowned in the pacific ocean. d. no error section 3 a. i could not put up in a hotel b. because the boarding and lodging charges c. were exorbitant. d. no error section 4 a. the indian radio b. which was previously controlled by the british rulers c. is free now from the narrow vested interests. d. no error