Which form to use -- ITR 2, 3 or 4?

I am a Senior citizen, and for AY 20-21, I have income from following sources: (i) Superannuation payment (coming from LIC): Rs 3 Lac p.a. (shown under Salaries head) (ii) Professional Charges as Visiting Faculty from Colleges: approx. Rs 4 Lac p.a. (iii) Income from Dividends and Interest :approx. Rs 15 lacs p.a. Which would be the right ITR form to file in such a case? Can I file ITR-2 as that appears to be the simplest? Many thanks for your advise.