चिकित्सा और पोषण शब्दावली में, संक्षिप्त नाम PEM का पूर्ण रूप क्या है?

Match List I (Condition / Cause) with List II (Characteristic Symptom): List I (Condition / Cause) (a) General protein deficiency in children (b) Fluid imbalance caused by lack of protein (c) Kwashiorkor (d) Marasmus List II (Characteristic Symptom) (i) Extreme thinness, loss of fat and muscle (ii) Swollen abdomen, thin limbs, poor growth (iii) Stunted growth, muscle wasting, and weakness (iv) Swelling in the body (Edema) Choose the correct answer from the options given below:

Individuals consuming a strict vegan or vegetarian diet without supplementation for 5 to 6 years typically risk developing low circulating levels of which nutrient?