Hey Sandip,

Yes, you can apply for WBJEE 2018.
Age Criteria: The minimum age for WBJEE 2018 candidates is 17 years as on December 31, 2018. Candidates should have been born on or before December 31, 2001. There is no upper limit for B.Tech programmes except for Marine Engineering where the upper age limit is 25 years as on December 31, 2018. 

Read full article here: https://engineering.careers360.com/articles/wbjee-eligibility-criteria