Hello,

To become an oncologist after completing your 12th (Science stream), follow these steps:

1. Pursue MBBS: Clear entrance exams like NEET to get into a recognized medical college and complete a 5.5-year MBBS degree.

2. Complete MD: After MBBS, appear for PG entrance exams (NEET-PG) and pursue a 3-year MD in General Medicine or Pediatrics.

3. Super Specialization: After MD, qualify for DM (Doctorate of Medicine) in Medical Oncology, which takes another 3 years.

4. Gain Experience: Post-training, work in hospitals or research institutions.

The entire process typically takes around 11-14 years, including studies and specialization.

Hope it helps !