Breast cancer mainly spreads to the veebrae
Answer- C. Batsons venous plexusMetastasis of breast cancer to bone, and especially to thoracic veebrae, is common due to the direct connection between the intercostal veins draining the breast and the internal veebral plexus ako known as Batson's plexus.
Aerial route
Direct Invasion
Batsons venous plexus
Via Axillary lymph nodes