According to the FDI/ISO numbering system, which quadrant is assigned the number 2?

Pleurodynia: ________

Fill in the blank with correct word.

Calculate the anion gap given the following data: Sodium = 143 mmol/L; chloride = 105 mmol/L; and HCO3 = 25 mmol/L

A. 13 mmol/L B. –13 mmol/L C. 63 mmol/L D. 273 mmol/L