Class 11 NEET Biology Structural Organisation in Animals

The correct answer is option (2) as blood does not contain fibre secreting cells called as fibroblasts. Whereas, cartilage, bone, adipose tissue and areolar tissue contain cells that secrete fibres of collagen or elastin or structural protein.
The other options (1), (3) and (4) are incorrect as they mention blood which lacks fibroblasts.