Step 1: Understanding the Concept:
Osteomalacia is a bone disorder in adults.
It has specific causes related to calcium and phosphorus metabolism.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the causes of osteomalacia.
Step 3: Detailed Explanation:
Osteomalacia in animals is caused by a wide difference in dietary calcium and phosphorus levels.
This imbalance leads to improper bone mineralization.
Vitamin D deficiency causes rickets in young animals.
Thus, the correct cause is the dietary imbalance.
Step 4: Final Answer:
Osteomalacia is caused by wide difference in dietary calcium and phosphorus level.
Hence, the correct option is (C).