For coordinates 14°49'N and 120°54'E, which cadastral number corresponds to the bottom right quadrant of the 1:500 sectional map for Sector 1-B?

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Understanding how cadastral numbers encode location on a 1:500 sectional map: a map tile is labeled by its sector (the big area), and each tile is further divided into four quadrants: NW, NE, SW, and SE. The quadrant tells you where inside that tile the point lies, with bottom-right being southeast.

For the coordinates given, the point falls within the tile labeled sec.1-B rather than sec.1-C, and within that tile it sits in the bottom-right portion. That combination—the coordinates, the sector 1-B, and the southeast quadrant—gives the cadastral code CM 14°49'N-120°54'E sec.1-B-SE. The other options misplace either the sector (1-C instead of 1-B) or the quadrant (top-left, top-right, or bottom-left instead of bottom-right), so they don’t match the location.