Army Officer

You can join Defense Services as +2 stage as follows:
(a) Join Army or Indian Air Force or Navy through NDA. Selection is based on NDA exam conducted by UPSC twice a year.
(b) There is another option to join Army at +2 stage. You may join OTS Chennai in 10+2 Technical Direct Entry scheme. This is open for male candidates who have passed 12th Class with Physics, Chemistry and Mathematics with not less than 70%. Those who make it in merit list based on marks undergo SSB for selection. After 5 years at OTS and CME Pune or MCTE Mhow or MCEME Secunderabad candidates get Engineering degree and job with starting salary of CTC of Rs 6+ Lakhs.
You can also join Defense Services after graduation for appearing for CDS examination conducted by UPSC. Engineering graduates can also join three services directly without appearing for any examination.

you can also clear rally recruitments only if you are overage for NDA Also, you can join as airmen in iaf or sailor in navy. remember age is more for small ranks. I would suggest you that go for NDA, also keep on practising for recruitement rally because, the more early you enroll urself in it, it would be best for u. u can also take commission in it, it would be easier for u. also keep an eye on Indian coast guard, crpf, itbp, bsf, etc. the NDA forms are available in may/June and Nov/DEC every year. the exam is held 2 a year. for sailor's once a year, for army smaller ranks once a year, for air force once a year in DEC/jan . check on their website for more details. also keep ur body fit, tough for it, after all ur going to be part of THE INDIAN ARMY.