@suman..... to b very frank with u... INTERNAL & LAB marks r totally depends on the college ... & lab e kono review hoina..... once u got (C) tht means its final... university will not entertain ne quires or changes in it...... i kno tht (O) hole point ta onekta change hoejeto...ekhon kicchu korar nei ... sorry to say bt its true.....take care.