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The length property belongs to which of the following objects?

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The length property belongs to which of the following objects?

(a) Window

(b) Element

(c) History

(d) Document

This question was posed to me in semester exam.

I'm obligated to ask this question of Error Handling in section Document Object Model and Event Handling in Javascript of JavaScript

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The correct answer is (c) History

To explain I would say: The length property of the History object specifies the number of elements in the browsing history list. The property returns at least 1, because the list includes the currently loaded page.

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