This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
Release of histamine and leukotrienes from mast cells is prevented by: 
Select and explain. 
A. Zileuton, B. Nedocromil sodium, C. Zafirlukast, D. Fexofenadine
B: Nedocromil sodium
Answer: B: Nedocromil sodium 
Explanation: nedocromil and sod.cromoglycate- mast cell stabilizers Sodium cromoglycate (Cromolyn sod.) is a synthetic chromone derivative which inhibits degranulation of mast cells (as well as other inflammatory cells) by trigger stimuli. Release of mediators of asthma-like histamine, LTs, PAF, interleukins, etc. are restricted. Nedocromil sodium has propeies similar to those of cromolyn Sodium Pharmacology and pharmacotherapeutics Satoskar 24th page no. 586 ESSENTIALS OF MEDICAL PHARMACOLOGY 7th EDITION KD TRIPATHI PG NO.229