1). In a discrete metric space M any open Ball is
A). non empty subset of M 
B). empty 
C). either a singleton set or the whole space 
D). none of these 

2). A metric space M is separable if there exists a
A). dense subset in M 
B). countable dense subset in M 
C). uncountable Idense subset in M 
D). none of these 

3). Let M be an uncountable discrete metric space. Then M is
A). separable 
B). not separable 
C). empty 
D). none of these 

4). Any discrete metric space is
A). not complete 
B). complete 
C). finite 
D). none of these 

5). Any subspace of a complete metric space is
A). complete 
B). closed 
C). need not be complete 
D). none of these 

6). Any subset A of a complete metric space is complete if and only if
A). A is closed 
B). A is open 
C). A is finite 
D). A is countable 

7). A complete metric space is of
A). first category 
B). second category 
C). both (A) and (B) 
D). none of these 

8). R is of
A). second category 
B). first category 
C). third category 
D). none of these 

9). Any discrete metricspace is
A). first category 
B). second category 
C). third category 
D). none of these 

10). Any discrete metric space having more than one point is
A). connected 
B). finite 
C). null set 
D). disconnected 
