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A convex lens and a concave lens having focal lengths $10\ \text{cm}$ and $20\ \text{cm}$ respectively are placed in contact with each other. Which of the following statements is correct about the lens combination ?
- (a)It will behave like a plane glass slab.
- (b)It will behave like a convex lens.
- (c)It will behave like a concave lens.
- (d)It will behave like a cylindrical lens.
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(B) It will behave like a convex lens. (1 Mark)