Trees _______ his vision; he couldn't see much of the Square's southern half. A: smeared B: hid C: confused D: obscured

Which one is not right about diagnosis of pneumonia? A: alpha-hemolytic colony grown on bloody agar plate; B: Capsular swelling reaction is used to determine serotype.; C: Bile suppresses dissolve of the colony . D: Sputum is smeared for Gram stain and examined microscopically.