This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
A 45-year-old woman underwent a modified radical mastectomy 4 years ag0. She was treated for multiple bone metastasis with cyclophosphamide, doxorubicin, and fluororacil for 6 months. She is complaining of exeion on exercise, swelling of the legs, and swelling around eyes in the morning. On examination, she has bilateral rales in the lungs, s1, s2 audible, s3, s5 gallop present. Her BP is 149/117 mm Hg, PR is 80/min, RR is 18/min. what is the most likely cause for her cardiac condition? 
Select and explain. 
A. Systolic dysfunction CHF, B. Drug induced cardiac toxicity, C. Metastatic cardiac disease, D. Pneumonia
B: Drug induced cardiac toxicity
Answer: B: Drug induced cardiac toxicity 
Explanation: Drug-induced cardiotoxicity is a major adverse effect that has been encountered for some clinically impoant drugs especially antineoplastic agents. This toxicity has previously led to the post-marketing withdrawal of numerous pharmacologically active drugs and limits the efficacy of other clinically useful ones Ref Davidson 23rd edition pg 1213