Mumbai is India's most expensive and world's __________ most expensive office market, according to CB Richard Ellis Group's semi-annual Global Office Rents survey released in 2010.

Mumbai is India's most expensive and world's fourth most expensive office market, according to CB Richard Ellis Group's semi-annual Global Office Rents survey released recently London's West End remains the world's most expensive office market followed by Hong Kong's Central Business District and Tokyo's Inner Central. Delhi dropped to 11^th place in the CBRE rankings, which tracks occupancy costs for prime office space in 176 cities worldwide.