Question

a ____________ lines the capsule of synovial joints, secreting synovial fluid.
synovial membrane
bursa
cartilage

Explanation:

The synovial membrane lines the capsule of synovial joints and secretes synovial fluid. Bursa is a fluid - filled sac for cushioning and cartilage is a connective tissue in joints but not the one secreting synovial fluid.

Answer:

A. synovial membrane