Statement Analysis: Northeast Monsoon

• Statement A: Northeast India gets maximum rainfall. This is FALSE. The Northeast monsoon primarily affects South India, particularly the east coast. Northeast India receives most of its rain from the Southwest monsoon.
• Statement B: The winds are north-easterlies over Bay of Bengal. This is TRUE. During the Northeast monsoon season (roughly October to December), winds blow from the land towards the sea. Over the Bay of Bengal, these winds are generally north-easterlies, picking up moisture that causes rainfall.
• Statement C: Maximum number of tropical depressions, storms and cyclones are formed over Arabian Sea. This is FALSE. Most tropical cyclones affecting India form in the Bay of Bengal, not the Arabian Sea.
• Statement D: ITCZ is located south of $20^\circ\text{N}$. This is TRUE. The Inter Tropical Convergence Zone (ITCZ) shifts south during the winter months, generally lying south of $20^\circ\text{N}$ latitude, which is characteristic of the Northeast monsoon period.

Conclusion

Based on the analysis, statements B and D are TRUE.

Therefore, the correct combination is B, D.