The green arrow points to a mark on a DSLR camera body. What does this mark represent?
The symbol is a small circle with a short horizontal line through it. On cameras this denotes the film/sensor focal plane—the exact plane where the image is formed on the sensor (or film). It serves as the reference point for precise focus-distance measurements (e.g., when focusing by measured subject distance or for macro/cinema work).
It is not an infinity-focus indicator (A), has nothing to do with aperture state (B), and is unrelated to firmware (D). Therefore the correct choice is
(C) Focal Plane.


Count the number of squares in the given figure. 
Count the number of fonts used in the given set of words. 
Count the number of squares in the given figure. 
Shown below are three types of interlocking rods. There are in total 12 rods: 6 of type A (8 cm), 2 of type B (5 cm), and 4 of type C (4 cm). What is the maximum straight length obtainable by connecting the rods appropriately?
Based on the excerpt on Indonesian Shadow Puppet Theatre: 
Shown below is a belt–pulley arrangement. How many pulleys are rotating clockwise?




