Movement and accumulation of ions across a membrane against their concentration gradient can be explained by

1. A. Osmosis
2. B. Facilitated Diffusion
3. C. Passive Transport
4. D. Active Transport

Attempt this NEET 2023 Biology question free — pick an option to reveal the correct answer and a step-by-step explanation. Then join NEET Mastery Quest to practise 15,000+ PYQ and 2027-syllabus questions.