Which of these units is not named after a scientist?

Which of these units is not named after a scientist?

ان میں سے کون سی اکائی کسی سائنسدان کے نام پر نہیں ہے؟
Explanation
  • Rolf Maximilian Sievert:

Sievert is the unit of radiation absorption.

  • Charles Coulomb

Coulomb is the unit of electric charge.

  • Anders Jonas Angstrom:

Angstrom is the unit of length.