HI,

See it is possible to again apply for wbjee, if your 12th score is good and wbjee rank is decent you may get the chances to get admission in government colleges or tier 1 private engineering colleges. however during the placement time you would not eligible for  some tier 1 mncs like tcs, cognizant, wipro etc because of your year gap. however if you have decent academic skill and cutting edge technology knowledge you may get chances in start up companies. so  think wisely before choosing career in engineering filed.