Step 1: Understanding the question.
The question asks about the launch site of PSLV (Polar Satellite Launch Vehicle) missions conducted by ISRO.
Step 2: Analyzing the options.
(A) Sriharikota: Correct — PSLV is launched from Satish Dhawan Space Centre located at Sriharikota.
(B) Bengaluru: Bengaluru is ISRO’s headquarters but not a launch site.
(C) Thiruvananthapuram: It hosts the Vikram Sarabhai Space Centre, mainly for research.
(D) Ahmedabad: Ahmedabad houses space application centers, not launch facilities.
Step 3: Conclusion.
PSLV is launched from Satish Dhawan Space Centre, Sriharikota.