Select the option that can be used as a one-word substitute for the given group of words.
Climb or move with difficulty or a lot of effort, typically using one's hands and feet

Correct option is B

The correct one-word for the given group of words is (b) Clamber.
Clamber: To climb or move with difficulty using both hands and feet, especially on something steep or uneven. (मुश्किल से चढ़ना या सरकना)
Example: He clambered up the rocky slope with great effort.
Meanings of the given other options:
· (a) Pedagogy: The art or science of teaching (शिक्षा पद्धति)
· (c) Quack: A person who falsely claims to have medical skills (नकली वैद्य)
· (d) Retreat: To move back or withdraw (पीछे हटना)